Gas stove or heater.



N0. 629,454. Patented luly 25, |899. S. N., M. A. & G. E. MENTEL.

GAS STOVE 0B HEATER.

(Application filed Jan. 12, 1898.) (No Modal.)

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WITNESSES- 'l f f X "ta/wk ATTORNEY.

No. 629,454. Patented luly 25, |899.

S. N., M. A. &. G. E. MENTEL.

GAS STOVE uill' HEATER.

(Application filed Jan. 12, 1898.) (No Model.) 2 Sheets-Sheet 2.

M ATTORNEY.

THE Naam: PETERS co.. PuoTmLlwo.. WASHINGTON, Dv c.

UNITED j STATES PATENT OFFICE.

SIMON N. MENTEL, MARIT A. MENTRE, AND GEORGE E. MENTEL, OE SPRINerIELD,vOHIO SAID MARY A. MENTEL ASSIGNOR To SAID GEORGE E. MENTEL.

SPECIFICATION forming part of Letters Patent No. 629,454, dated J' uly25, 1899-* Application filed January 12, 1898. Serial No. 666,473. (Nomodel.)

T0 all whom, it muy concern:

Be it known that we, SIMON N. MENTEL, MARY A. MENTEL, and GEORGE E.MENTEL, citizens of the United States, residing at Springfield, in thecounty'of Clark and State of Ohio, have invented certain new and usefulImprovements in Gas Stoves or Heaters, of which the following isa'speciiication, reference being had therein to the accompanyingdrawings.

Our invention relates to certain new and useful improvements in gas orgasolene stoves or heaters.

The objects of our invention are to provide an economical andcheaplymanufactured stove or heater in which gas-natural orartiiicial-or gasolene may be used without producing any odor resultingfrom incomplete combustion when not connected with a chimneynlue; and to-that end our invention has reference to means for providing a positivedraft for the return of substantially all the products arising from orthrough the burner back to the burner in contact with the iiame, wherebythe unconsu med combustible products may be properly consumed, thusobtaining complete combustion, and to provide an improved burner,whereby the combustible products are divided upon entering the bu rnervand a continuous supply of air envelops each side of said burner, thussupplying an abundance of oxygen, whereby the flame is augmented. l

Our invention also has reference to details of construction andarrangement hereinafter appearing, and particularly pointed out in theclaims.

In the accompanying drawings, on which like reference letters andfigures indicate corresponding parts, Figure l is a vertical side andfront perspective view of one form of our heater; Fig. 2, anothersectional elevation on the line so x of Fig. l, showing the mixer andburner in section; Fig. 3,another sectional elevation 'on the line y yof Fig. l; Fig. 4, a rear perspective view; Fig. 5, a detail view'of thestop-cock and a scale for showing the amount of gas passing through saidstopcock; Fig. 6, a perspective view of anotherform of our burner,partly in section, and showing the gasinlet openings-5 Figli, a detailsectional view of the burner used in our second form on the line y y' ofFig. l2; Fig. 12, a plan View of the burner used in the second formlwith a portion broken away to show the gasv inletopenings.

In our invention we have produced a heater or stove which may be placedinany desired position within a room and without the necessity ofconnecting it in any manner to a chimney pipe or iiue and at the sametime one which will not produce any unpleasant odors.

lThe letter A represents suitable legs, upon which is mounted the heaterproper, B, preferably formed of sheetiron or other suitable material forreadily conducting the heat to the surrounding air. The front face C ofourheater has a hole or opening D. J ust below this hole or opening islocated our improved burner E, which is supported upon brackets F, asshown in dotted lines in Fig. l, and the strip of sheet metal G, whichis carried by the legs A. This burner is located within the frame H,with an air-space on each side between the'burner andthe sides oftheframe. Fresh air from the room passes up through these openings and.constantly feeds the flame with the oxygen for proper combustion andwhich assists in increasing the intensity of the iiame, and consequentlya larger proportion of the combustible products iu the fuel areutilized; but in case all the combustible products are not sufficientlyburned they will pass through the fire again, as will presently 2, 3,and 4..

anion nt is indicated on the scale by the pointer O. The figures on thisscale indicate the number of cubic feet being consumed per hour.

We will now refer to the baflie-walls located within our apparatus, asclearly indicated in dotted lines in Fig. 1. .A front baffle-wall Pextends from the bottom of the outside shell o1' casing B forward andupward a short distance above the upper edge of the hole or opening Dand is riveted to or in any other suitable manner connected with theoutside shell or casing B. The front surface of this baile-wall P may becovered with asbestos or other suitable material for deiiecting the heatthrough the opening D. The products of combustion are carried up overthe end of said b afiie-wall P and are deflected downward by thebaiile-wall Q, and thence around its lower end and up between thepartitions R in the space between the baiile-wall Q and the rear of theheater, as clearly shown in Figs. It will be seen that the upper end ofthe shell or casing'of our stove has a rear extension S. Down-pipes T,T', andU connect with this extension S and open into spaces partitionedoff by the partitions R.. The pipes T and T extend down beneath theshell or casing and enter an air-reservoir V, preferably triangular incross-section and having a narrow slit or opening along its upper edge.This air-reservoir is located next to the burner, so that the air inpassing up out of the same will mingle with the llames from the burner,and hence any combustible products not heretofore consumed will be againacted upon by the llame. Should anything be left nnburned at this time,it will again pass around, as before, and through the lire a secondtime, and so on continuously, until not a vestige of combustibleproducts is left.

Referring again to the pipe U, which connects with the space between thepartitions R R, it will be seen lthat at its lower end we have applied acap w. Vhen it is desired to connect with an outside flue or chimney,this cap w is removed, and the chimney-pipe X (shown in dotted lines) isthen attached. However, it is not intended to connect this stove orheater with a chimney for ordinary use; but we have provided this meansof attachment if for any reason it is found desirable to do so.

We will now refer to' our second form of heater. This form embodies allof the essential elements contained in our rst form, but is somewhatVcheaper to co`nstruct and occupies less space than the other and is usedprincipally for heating small rooms-such, for instance, as bath-rooms.In this form we simply use a drum 1 for our outer shell or casing,having a hole or opening 2. The upper end of the shell or drum isinclosed by a cap 3. A down-pipe4 connects with this shell or drum nearits upper end and passes thence down along the side of said drum andundere2e,454 l neath the same and extends through the bottom of thedrum, at the center thereof, and within a circular burner 5, whichsurrounds said pipe 4, and has an air-space between said burner and saidpipe for the passage of air from the room. This circular burner 5 has anannular slit or opening 6, which opens into the interior space and whichthus directs the flames toward the center of the burner. It will thus beseen that the heated air and the unburned combustible products willagain come in contact with the flame as they escape from the pipe 4 inthe same manner as heretofore described in connection with the firstform'. The air from the room is also fed to the ilame in a similarmanner as described in said iirst form, the only principal diiference inthe two forms being in the use of a circular burner having a continuousannular gasopening. In order to lnore readily direct the productspassing through the pipe t into the Haine, we provide a deilector 7,which is snspended within the pipe 4 by means of arms 8, which radiatefrom said deiiector and extend upward and are bent over the upper edgeof the pipe in the form of hooks. This de' flector causes the air topass into the ame in a thin annular sheet, in which condition it morereadily mixes with the iiame, and hence more of the unconsumed productsare added to the ame.

In both forms of burners at the point Where the gas enters the burnerproper we have provided a double Opening 9 and 10, with a narrow bridgeof metal l1 between them. This narrow bridge splits or divides themixture to be burned, and part goes in one direction and part in theopposite direction, and consequently assists in producing an even flamethroughout the length of the burner, and thus prevents warping andtwisting of the burner, as frequently occurs where an irregular flame isproduced. In the circular form of burner we have provided lugs orextensions l2,which project onto a ring 13, which ring is supported bythe inturned upper ends of the legs 14C. The burner is thus afforded asuitable support and may be readily removed when desii-ed.

Any ordinary form of mixer may be employed. The one herein illustrated,as shown at J, is bell-shaped and has a bridge-piece 16, which has anextension K,with a hole or opening therein. This extension K acts as anozzle, and air is drawn in all around the union 18, screwed onto thenozzle or extension K. This union is also screwed onto the gas orgasolene pipe I. i

By the term tortuous passage as elnployed in the specification andclaims is meant the passage through the heater in which the direction ofthe products of combustion is changed or varied, such passage beingconsidered as commencing at or near the upper end of the baffle-wall P,as shown in Figs. 1 to 4, inclusive, and at the upper end of the pipe 4,as shown in Figs. 6 and 7.

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Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

l. In a stove or heater, the combination with a shell or casing having agas or gasolene burner located therein, and one or more bathe-walls toform a tortuous passage, and

- also having cross-partitions for dividing said with the interior ofsaid shell, of one or more battle-walls also located therein andvforming a tortuous passage for the products of combustion, such tortuouspassage commencing near where said products make their first turn, oneor more down-pipes communicating with said tortuous passage and adaptedv to conduct all of said products of combustion within said tortuouspassage to and through the dame fromsaid burner, substantially as shownand described.

3. In a stove or heater, the combination with a shell or casing having agas or gasolene burner located therein, and an opening communicatingwith the interior of said shell ot one or more bafiie-walls also locatedtherein and forming a tortuous passage for products of combustion, anair reservoir or re' ceptacle having a narrow slit therein in closeproximity to said burner, and one or more down-pipes connecting saidtortuous passage with said reservoir, the slotted opening in saidreservoir adapted to discharge a thin sheet of the products passingthrough said heater into the flame from said burner.

4. `I-n a stove or heater, the combination with a shell or casing havinga downwardlyextending pipe communicating with the interor of thestove-at its bottom, of a burner located near the bottom of the stoveand provided with a discharge-outlet at the side thereof, the dischargeend of the pipe B being in substantially the same plane as thedischargeoutlet of the burner, there being also an open space at thebottom of the stove leading to the burner for its fresh-air supply.

5. In a gas stove or heater, the combination with a frame structure H,of a gas'or gasolene burner mounted therein and having openings in theside thereof, and a bridge 1l for distributing incoming gases within theburner, substantially as shown and described.

In testimony whereof we affix our signatures in presence of twoWitnesses.

SIMON N. MENTEL. MARY A. MENTEL. GEORGE E. MENTEL. 1Witnesses:

ALLAN A. FISH, 0. B. TROUT.

